<head>
    <meta charset="UTF-8">
    <title>h标签-标题</title>
</head>
<body>
<h1>h标签，共有6级</h1>
<p>代码示例：&lt;h1&gt;Hello World&lt;/h1&gt;</p>
<h1>Hello World--h1</h1>
<h2>Hello World--h2</h2>
<h3>Hello World--h3</h3>
<h4>Hello World--h4</h4>
<h5>Hello World--h5</h5>
<h6>Hello World--h6</h6>
</body>

